https://en.wikipedia.org/wiki/Area_codes_514_and_438
Area codes 514 and 438 are telephone area codes of the North American Numbering Plan (NANP) for Montreal and most of its on-island suburbs, specifically the Island of Montreal and Île Perrot in the Canadian province of Quebec.. Area code 514 was one of the original area codes assigned by AT&T in 1947. The original numbering plan area (NPA) was split twice: in 1957 to …